Github user galen-pivotal commented on a diff in the pull request:

    https://github.com/apache/geode/pull/716#discussion_r134358612
  
    --- Diff: 
geode-protobuf/src/main/java/org/apache/geode/protocol/protobuf/operations/GetAvailableServersOperationHandler.java
 ---
    @@ -50,51 +37,23 @@
       @Override
       public Result<ServerAPI.GetAvailableServersResponse> process(
           SerializationService serializationService, 
ServerAPI.GetAvailableServersRequest request,
    -      Cache cache) {
    -
    -    InternalDistributedSystem distributedSystem =
    -        (InternalDistributedSystem) cache.getDistributedSystem();
    -    Properties properties = distributedSystem.getProperties();
    -    String locatorsString = 
properties.getProperty(ConfigurationProperties.LOCATORS);
    +      MessageExecutionContext executionContext) throws 
InvalidExecutionContextException {
     
    -    HashSet<DistributionLocatorId> locators = new HashSet();
    -    StringTokenizer stringTokenizer = new StringTokenizer(locatorsString, 
",");
    -    while (stringTokenizer.hasMoreTokens()) {
    -      String locator = stringTokenizer.nextToken();
    -      if (StringUtils.isNotEmpty(locator)) {
    -        locators.add(new DistributionLocatorId(locator));
    -      }
    +    InternalLocator locator = executionContext.getLocator();
    +    ArrayList serversFromSnapshot =
    --- End diff --
    
    I don't like that this has to go so far in to get a list of servers. I'd 
like to see the DUnit test (or an integration test using a real Locator) come 
back just so we can have some guarantee that `InternalLocator` doesn't change 
on us.


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